IOW College Library Resources

How sundials tell time

Medium Periodical Article
Medium - part of - (Periodical Copy) (Number) 178 (Date) July
Medium (Periodical) How it works.
Classif 600 HOW
Subject History and Technology
Page 60-61
Authors Dutfield, Scott
Contents

These ancient time-keeping devices keep track of Earth's movement around the Sun

Keywords
Astronomy     Historical background     Sunlight     Time measurement and calendars